Post Graduate Engineering Education from Home for Optical Networking Laboratory during COVID19 Second Wave in India

Effective Teaching learning process must be very difficult in this COVID19 era for engineering teachers where they need support of hardware to explain certain fundamental things. Optical networking is one subject where it is difficult to explain certain results without experimental analysis. This paper describes basic optical networking experiments like Wavelength Division Multiplexing types of Passive Optical Network (WDM-PON), Time Division Multiplexing types of Passive Optical Network (TDM-PON), Fiber to the Home Network (FTTH), Wireless passive Optical Network using free space optics (FSO) techniques. Optsim 5.0 software is used to simulate the applications. © 2022 IEEE.

GNPy model of the physical layer for open and disaggregated optical networking [Invited]

Networking technologies are fast evolving to support the request for ubiquitous Internet access that is becoming a fundamental need for the modern and inclusive society, with a dramatic speed-up caused by the COVID-19 emergency. Such evolution needs the development of networks into disaggregated and programmable systems according to the software-defined networking (SDN) paradigm. Wavelength-division multiplexed (WDM) optical transmission and networking is expanding as physical layer technology from core and metro networks to 5G x-hauling and inter- and intra-data-center connections requiring the application of the SDN paradigm at the optical layer based on the WDM optical data transport virtualization. We present the fundamental principles of the open-source project Gaussian Noise in Python (GNPy) for the optical transport virtualization in modeling the WDM optical transmission for open and disaggregated networking. GNPy approximates transparent lightpaths as additive white and Gaussian noise channels and can be used as a vendor-agnostic digital twin for open network planning and management. The quality-of-transmission degradation of each network element is independently modeled to allow disaggregated network management. We describe the GNPy models for fiber propagation, optical amplifiers, and reconfigurable add/drop multiplexers together with modeling of coherent transceivers from the back-to-back characterization. We address the use of GNPy as a vendor-agnostic design and planning tool and as physical layer virtualization in software-defined optical networking.